The Westinghouse WGen11500DFc is the better portable generator overall, rated 4.3 to 4.1. The Westinghouse WGen11500DFc leads on value. The DuroMax XP15000HXT wins on fuel options, run time and warranty. The Westinghouse WGen11500DFc costs $1,250 less ($1,349 vs $2,599).
A large dual-fuel generator with clean power and remote start for whole-home backup through a 50 A transfer switch. A good fit for homeowners without a natural gas line who want more than 10,000 W.
Amazon $1,349A very large tri-fuel generator for whole-house backup through a 50 A transfer switch, with a big tank for long runs on gasoline between refills.
DuroMax $2,599Prices were last checked October 28, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Each factor is scored 0-100 against the same fixed reference points for every large portable generator; a clear win is highlighted. How we rank explains each one.
| Factor weight | Westinghouse WGen11500DFc | DuroMax XP15000HXT |
|---|---|---|
| Overall rating | 4.3/5 | 4.1/5 |
| Value 30% | 78 $0.12 per running watt | 20 $0.22 per running watt |
| Run time 15% | 55 9.5 hours on a tank at 50% load | 80 12 hours on a tank at 50% load |
| Fuel options 15% | 70 gasoline or propane | 100 gasoline, propane or natural gas |
| Home hookup 15% | 100 240 V outlet for a transfer switch | 100 240 V outlet for a transfer switch |
| CO safety 10% | 100 shuts off when carbon monoxide builds up | 100 shuts off when carbon monoxide builds up |
| Warranty 10% | 67 3-year warranty | 100 5-year warranty |
| Starting 5% | 100 electric start with a remote fob or app | 100 electric start with a remote fob or app |
| Westinghouse WGen11500DFc | DuroMax XP15000HXT | |
|---|---|---|
| Output | ||
| Gasoline | 11,500 W running, 14,500 W starting | 12,000 W running, 15,000 W starting |
| Propane | 10,500 W running, 13,500 W starting | 11,400 W running, 14,250 W starting |
| Natural gas | - | 10,260 W running, 12,825 W starting |
| Outlets | 4 × 120 V, L14-30, 14-50, USB | 10 × 120 V, L5-30, L14-30, 14-50 |
| Transfer switch ready | Yes, 240 V | Yes, 240 V |
| Full power at 120 V | No | - |
| Total harmonic distortion | under 5% | under 5% |
| Price per watt | $0.12 | $0.22 |
| Fuel and run time | ||
| Fuel | Gasoline, propane | Gasoline, propane, natural gas |
| Tank | 9.5 gal | 13.2 gal |
| Run time (gasoline) | 9.5 hr at 50% load | 12 hr at 50% load |
| Run time (propane, 20 lb tank) | 7 hr | - |
| Engine | 550 cc | 670 cc |
| Noise and safety | ||
| Rated noise | 74 dBA | 78 dBA |
| CO shutoff | Yes | Yes |
| CARB compliant | No | No |
| Build | ||
| Starting | Remote, electric and recoil | Remote, electric and recoil |
| Wheels | Yes | Yes |
| Dimensions | 28.9 x 29.6 x 26.9 in | 36 x 33.2 x 32 in |
| Weight | 230 lb | 362 lb |
| Warranty | 3 years | 5 years |
| Released | 2025-03 | 2023-09 |
